Quote:
Originally Posted by Morthoron
The wall was meant to impede invaders, not stop them. A series of redoubts (like the Causeway Forts along the road to Osgiliath), could be defended for a time, but it was simply a delaying tactic. As a historical example, Hadrian's Wall in Northern England was never fully defended, nor was it meant to be. But there were milecastles supported by troops.
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I agree on the impediment idea, but I still think the Wall would have had some psychological benefit after Ithilien fell, giving some sense of security to those in Minas Tirith.